I'm very interested in buying a used solid-state amp, and I found one for a fairly good price. The only issue is, the pots recently have had to get resoldered. The thing I'm wondering about, is how big of a risk is that to me? Is it possible they may last a few weeks, and then give out due to a bad solder job, or would it be almost instantly recognizable if it was a bad job? Could I even perhaps be better off with a fresh solder? I'd be getting it through guitar center, so there is a fairly good return policy, I just don't want the amp to last a few months and then give out, possibly not allowing me return it since it'll be past the regular return date. Thank you.